CN114697882A - Train real-time broadcasting system and method in unmanned scene - Google Patents
Train real-time broadcasting system and method in unmanned scene Download PDFInfo
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- CN114697882A CN114697882A CN202210454311.XA CN202210454311A CN114697882A CN 114697882 A CN114697882 A CN 114697882A CN 202210454311 A CN202210454311 A CN 202210454311A CN 114697882 A CN114697882 A CN 114697882A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
Abstract
The invention provides a train real-time broadcasting system and method under an unmanned scene, which relate to the technical field of train broadcasting and comprise the following steps: the unmanned train comprises a train-mounted station and a broadcasting system; the dispatching desk adds each unmanned train needing real-time broadcasting into a train broadcasting talk group and respectively sends real-time broadcasting requests to the train broadcasting talk group; the vehicle-mounted station switches the corresponding broadcasting system to a real-time broadcasting state according to the real-time broadcasting request and sends a real-time broadcasting response to the dispatching station; the dispatching desk sends real-time voice to each vehicle-mounted platform of each unmanned train in the train broadcast call group according to the real-time broadcast response; and the vehicle-mounted station decodes the real-time voice to obtain decoded voice and sends the decoded voice to the broadcasting system for real-time playing. The wireless broadband wireless connection is established between the dispatching desk and the train-mounted platform of the unmanned train, so that remote real-time broadcasting of the train is realized, the participation of a driver is not needed, and the wireless broadband wireless connection is suitable for an unmanned scene; the broadcasting range is large, and the operation is simple.
Description
Technical Field
The invention relates to the technical field of train broadcasting, in particular to a real-time train broadcasting system and method under an unmanned scene.
Background
In a traditional manned scene, real-time broadcasting of rail transit trains is usually completed by a driver operating a train broadcasting terminal of a cab. Under the unmanned driving scene, the train is no longer equipped with drivers, and real-time train broadcasting cannot be realized in the train. Meanwhile, the existing train broadcasting system and the dispatching desk are separate systems, if real-time train broadcasting is needed, corresponding broadcasters can only be informed to operate the train broadcasting system through the telephone of the ground dispatcher, or the ground dispatcher operates the train broadcasting system in a cross-system mode, the broadcasting instantaneity cannot be guaranteed, and the labor cost is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a train real-time broadcasting system under an unmanned scene, which comprises:
the system comprises at least one unmanned train, a control system and a broadcasting system, wherein each unmanned train comprises a train carrying platform and the broadcasting system is connected with the train carrying platform;
a dispatch station establishing a broadband wireless connection with each of the unmanned trains, the dispatch station comprising:
the communication establishing module is used for adding each unmanned train needing real-time broadcasting into a train broadcasting communication group and respectively sending a real-time broadcasting request to the vehicle-mounted station of each unmanned train in the train broadcasting communication group;
the vehicle-mounted station comprises a broadcast preparation module, a real-time broadcast response module and a real-time broadcast response module, wherein the broadcast preparation module is used for switching the corresponding broadcast system to a real-time broadcast state according to the real-time broadcast request and sending a corresponding real-time broadcast response to the dispatching station according to the real-time broadcast state;
the dispatching desk also comprises a real-time broadcasting module which is used for sending real-time voice to each vehicle-mounted station of each unmanned train in the train broadcasting talk group according to the real-time broadcasting response;
the vehicle-mounted station also comprises a voice processing module which is used for decoding the real-time voice to obtain decoded voice and sending the decoded voice to the broadcasting system for real-time playing.
Preferably, the broadcast preparation module includes:
the first switching unit is used for setting the corresponding train broadcast talk group as a default talk group according to the real-time broadcast request, then opening a broadcast voice channel of the corresponding broadcast system, and switching a voice output channel of the broadcast system from a loudspeaker to the broadcast voice channel so as to switch the broadcast system to a real-time broadcast state;
the first response unit is connected with the first switching unit and used for sending the real-time broadcast response representing successful preparation to the dispatching desk when the broadcasting system is successfully switched to the real-time broadcasting state, and sending the real-time broadcast response representing failed preparation to the dispatching desk when the broadcasting system is not successfully switched to the real-time broadcasting state;
and when the broadcasting system is successfully switched to the real-time broadcasting state, the vehicle-mounted station sends the decoded voice to the broadcasting voice channel so as to be played by the broadcasting system.
Preferably, the dispatching station further includes a call ending module, where the call ending module includes a ending start unit, and is configured to stop starting the real-time voice, start a broadcast ending request to each vehicle station in the train broadcast talk group, and delete the train broadcast talk group when the real-time broadcast needs to be ended;
the vehicle-mounted station further includes a broadcast ending module, where the broadcast ending module includes a second switching unit, which is used to recover a default talk group before real-time broadcast according to the broadcast ending request, control to close the broadcast voice channel of the corresponding broadcast system, and switch the voice output channel of the broadcast system from the broadcast voice channel to a speaker, so as to switch the broadcast system to a state before real-time broadcast.
Preferably, the vehicle-mounted station has an analog audio interface, the analog audio interface is connected to the broadcast voice channel of the broadcast system through a dry contact, and the vehicle-mounted station correspondingly opens or closes the broadcast voice channel of the broadcast system by controlling to open or close the dry contact.
Preferably, the broadcast ending module further includes a second response unit, connected to the second switching unit, and configured to send an end real-time broadcast response to the scheduling station after the broadcast system is switched to the state before real-time broadcast.
Preferably, the call termination module further includes a timing unit, connected to the termination initiation unit, and configured to start timing and continuously output a timing result each time the broadcast termination request is initiated, and output a repeated transmission signal when the timing result reaches a preset threshold time and the corresponding real-time broadcast termination response is not received;
the end initiating unit initiates the broadcast end request again according to the repeated sending signal.
Preferably, the dispatching desk sends the real-time voice in a group calling mode for the train broadcast talk group.
Preferably, the dispatching desk establishes broadband wireless connection with each unmanned train through a 5G network or an LTE wireless broadband cluster network.
The invention also provides a real-time broadcasting method of the train in the unmanned scene, which is applied to the real-time broadcasting system of the train, wherein the real-time broadcasting system of the train comprises at least one unmanned train, and each unmanned train respectively comprises a train carrying platform and a broadcasting system connected with the train carrying platform; the train real-time broadcasting system also comprises a dispatching desk which establishes broadband wireless connection with each unmanned train; the real-time broadcasting method for the train comprises the following steps:
step S1, the dispatching desk adds each unmanned train needing real-time broadcasting into a train broadcasting talk group, and respectively sends a real-time broadcasting request to the train-mounted stations of each unmanned train in the train broadcasting talk group;
step S2, the vehicle-mounted station switches the corresponding broadcasting system to a real-time broadcasting state according to the real-time broadcasting request, and sends a corresponding real-time broadcasting response to the dispatching station according to the real-time broadcasting state;
step S3, the dispatching desk sends real-time voice to each train-mounted platform of each unmanned train in the train broadcast call group according to the real-time broadcast response;
and step S4, the vehicle-mounted station decodes the real-time voice to obtain decoded voice, and sends the decoded voice to the broadcasting system for real-time playing.
Preferably, the step S2 includes:
step S21, the vehicle-mounted station sets the corresponding train broadcast talk group as a default talk group according to the real-time broadcast request, then opens the broadcast voice channel of the corresponding broadcast system, and switches the voice output channel of the broadcast system from a loudspeaker to the broadcast voice channel so as to switch the broadcast system to a real-time broadcast state;
step S22, the vehicle-mounted station sends the real-time broadcast response representing successful preparation to the dispatching station when the broadcasting system is successfully switched to the real-time broadcast state, and sends the real-time broadcast response representing failed preparation to the dispatching station when the broadcasting system is not successfully switched to the real-time broadcast state;
when the broadcasting system is successfully switched to the real-time broadcasting state, in step S4, the vehicle-mounted station sends the decoded voice to the broadcasting voice channel for the broadcasting system to play.
The technical scheme has the following advantages or beneficial effects:
1) the operation terminal of the real-time broadcast is integrated in the dispatching desk, so that the operation of dispatching personnel is facilitated, and the real-time performance of the broadcast is effectively guaranteed;
2) the dispatching desk and the train-mounted platform of the unmanned train are in broadband wireless connection, so that remote real-time broadcasting of the train can be realized, the participation of a driver is not needed, the dispatching desk is suitable for an unmanned scene, and the labor cost is effectively saved;
3) the broadcasting system can broadcast a single train, or any plurality of trains simultaneously, or an all-line train, and has a wide broadcasting range and simple operation;
4) the vehicle-mounted station and the broadcasting system adopt a control mode of simulating an audio interface and a dry contact, the interface is simple and universal, and the coupling degree is low.
Drawings
Fig. 1 is a schematic structural diagram of a real-time train broadcasting system in an unmanned scene according to a preferred embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a real-time broadcasting method for a train in an unmanned environment according to a preferred embodiment of the present invention;
FIG. 3 is a sub-flowchart of step S2 according to the preferred embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be included in the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems in the prior art, there is provided a real-time train broadcasting system in an unmanned scene, as shown in fig. 1, including:
the unmanned train 100 comprises a train platform 1 and a broadcasting system 2 connected with the train platform 1;
a dispatcher 200 that establishes a broadband wireless connection with each of the unmanned trains 100, the dispatcher 200 including:
the communication establishing module 3 is used for adding each unmanned train 100 needing real-time broadcasting into a train broadcast communication group and respectively sending a real-time broadcasting request to the vehicle-mounted station 1 of each unmanned train 100 in the train broadcast communication group;
the vehicle-mounted station 1 comprises a broadcast preparation module 11, which is used for switching the corresponding broadcast system to a real-time broadcast state according to the real-time broadcast request and sending a corresponding real-time broadcast response to the dispatching station 200 according to the real-time broadcast state;
the dispatching desk 200 further comprises a real-time broadcasting module 4 for sending real-time voice to each vehicle-mounted platform 1 of each unmanned train 100 in the train broadcasting talk group according to the real-time broadcasting response;
the vehicle-mounted station 1 further includes a speech processing module 12, configured to decode the real-time speech to obtain a decoded speech, and send the decoded speech to the broadcasting system 2 for real-time playing.
Specifically, in this embodiment, the dispatching desk 200 is disposed in a train control center, and serves as an operation terminal for train dispatching, and can initiate various trunking dispatching services, including a train real-time broadcasting service in the technical solution. The broadband wireless connection between the dispatcher 200 and each of the unmanned trains 100 is preferably established by an LTE-M core network, which provides service bearer between the dispatcher 200 and each of the unmanned trains 100 and provides a wireless transmission channel to the train-mounted stations 1 of each of the unmanned trains 100. The vehicle-mounted station 1 is a vehicle-mounted radio station of an unmanned train, realizes a cluster scheduling service function, and comprises the real-time broadcast of the technical scheme.
Further specifically, when the dispatching station 200 needs to initiate real-time broadcasting, an object to be broadcasted and the current dispatching station 200 are brought into a train broadcasting talk group for real-time broadcasting created temporarily by a dynamic recombination mode, and since the dispatching station 200 is in direct communication with the train-mounted station 1 of the unmanned train 100, preferably, the train broadcasting talk group can use the train-mounted station 1 to represent a corresponding unmanned train. Based on this, as a preferred embodiment, the object list including the unique identification information of the train stations 1 of all the connected unmanned trains 100 is arranged in advance in the dispatching desk 200. When the real-time broadcasting is needed, the dispatcher selects an object to be subjected to the real-time broadcasting from the object list through an operation interface of the dispatching desk 200, and the dispatching desk 200 further establishes a train broadcasting talk group based on a selected result so as to be used for subsequent real-time broadcasting.
Before performing real-time broadcasting, in the present embodiment, the dispatcher 200 first actively transmits a real-time broadcasting request to the vehicle station 1 of each unmanned train 100 corresponding to the train broadcasting talk group, and notifies each vehicle station 1 of preparation work before broadcasting, so as to confirm that the communication between the dispatcher 200 and the corresponding vehicle station 1 is normal, and the communication between the vehicle station 1 at the end of the unmanned train 100 and the broadcasting system 2 is normal and real-time broadcasting is possible.
When receiving the real-time broadcast request, the vehicle-mounted station 1 first switches the corresponding broadcast system to the real-time broadcast state, and sends a corresponding real-time broadcast response to the scheduling station 200 according to the real-time broadcast state, where the content of the real-time broadcast response may be whether the corresponding broadcast system 2 is ready successfully. Preferably, each real-time broadcast response may be displayed on an operation interface of the dispatching station 200, and according to the fed-back real-time broadcast response, the dispatcher may determine whether to perform the next real-time broadcast, and if it is determined that the next real-time broadcast is possible, send a real-time voice to each train-side station 1 of each unmanned train 100 in the train-to-train broadcast call group; and then the vehicle-mounted platform 1 decodes the real-time voice and sends the real-time voice to the broadcasting system 2 for real-time playing. Preferably, whether the next real-time broadcast can be performed or not can be determined manually by the dispatcher, or can be configured to be automatically executed by the dispatching desk 200, such as the following configurations: if the received real-time broadcast response has a high percentage of real-time broadcast responses indicating that the corresponding broadcasting system 2 is ready to successfully broadcast, the real-time broadcast is automatically performed, but the present invention is not limited thereto.
In a preferred embodiment of the present invention, the broadcast preparation module 11 includes:
a first switching unit 111, configured to set a corresponding train broadcast talk group as a default talk group according to a real-time broadcast request, then open a broadcast voice channel of a corresponding broadcast system 2, and switch a voice output channel of the broadcast system 2 from a speaker to the broadcast voice channel, so as to switch the broadcast system 2 to a real-time broadcast state;
a first response unit 112, connected to the first switching unit 111, for sending a real-time broadcast response indicating that the preparation is successful to the dispatching station 200 when the broadcast system 2 is successfully switched to the real-time broadcast state, and sending a real-time broadcast response indicating that the preparation is failed to the dispatching station 200 when the broadcast system is not successfully switched to the real-time broadcast state;
when the broadcasting system 2 is successfully switched to the real-time broadcasting state, the vehicle-mounted station 1 sends the decoded voice to the broadcasting voice channel so that the broadcasting system 2 can play the decoded voice.
Specifically, in this embodiment, when the real-time broadcast is not performed, the voice output channel of the broadcast system 2 of the unmanned train 100 is set as a speaker by default, and may be used to play information such as train arrival reminder. Upon receiving the real-time broadcast request, it is necessary to switch the voice output channel of the broadcasting system 2 from the speaker to the broadcast voice channel in preparation for the real-time broadcast.
In a preferred embodiment of the present invention, the dispatching desk 200 further comprises a call ending module 5, wherein the call ending module 5 comprises a ending initiation unit 51, configured to stop initiating real-time voice when the real-time broadcast needs to be ended, initiate a broadcast ending request to each vehicle-mounted station 1 in the train broadcast talk group, and delete the train broadcast talk group;
the vehicle-mounted station 1 further includes a broadcast ending module 13, and the broadcast ending module 13 includes a second switching unit 131, configured to restore the default talk group before the real-time broadcast according to the broadcast ending request, control to close the broadcast voice channel of the corresponding broadcast system 2, and switch the voice output channel of the broadcast system 2 from the broadcast voice channel to the speaker, so as to switch the broadcast system 2 to the state before the real-time broadcast.
Specifically, in this embodiment, the real-time broadcast of the unmanned train 100 is implemented in a group call mode, and in the real-time broadcast process, the group call right always belongs to the dispatching station 200 until the real-time broadcast is finished. After switching the broadcasting system 2 to the state before real-time broadcasting, the vehicle-mounted station 1 further includes a group scanning function for opening a relevant talk group, so as to ensure that the vehicle-mounted station can continuously execute a playing task before real-time broadcasting.
In a preferred embodiment of the present invention, the vehicle-mounted platform 1 has an analog audio interface 14, the analog audio interface 14 is connected to the broadcast voice channel of the broadcast system 2 through a dry contact 15, and the vehicle-mounted platform 1 controls to open or close the dry contact 15 to correspondingly open or close the broadcast voice channel of the broadcast system 2.
In a preferred embodiment of the present invention, the broadcast ending module 13 further includes a second response unit 132 connected to the second switching unit 131, for sending an end real-time broadcast response to the dispatching console 200 after the broadcasting system 2 is switched to the state before real-time broadcast.
In a preferred embodiment of the present invention, the call ending module 5 further includes a timing unit 52 connected to the ending initiating unit 51, and configured to start timing and continuously output a timing result when each broadcast ending request is initiated, and output a repeated sending signal when the timing result reaches a preset threshold time and a corresponding real-time broadcast ending response is not received;
the end initiation unit 51 initiates a broadcast end request again according to the repeat transmission signal.
Specifically, in this embodiment, when a broadcast termination request is initiated and a corresponding real-time broadcast termination response is not received within a time-out period, the broadcast termination request is repeatedly initiated, so as to ensure that the unmanned train 100 can normally terminate the real-time broadcast without affecting subsequent execution of other broadcast tasks.
In the preferred embodiment of the present invention, the dispatching desk 200 sends real-time voice by performing group calling on the train broadcast talk group.
In a preferred embodiment of the present invention, the dispatcher 200 establishes a broadband wireless connection with each unmanned train 100 through a 5G network or an LTE wireless broadband trunked network.
The invention also provides a real-time broadcasting method of the train in the unmanned scene, which is applied to the real-time broadcasting system of the train, wherein the real-time broadcasting system of the train comprises at least one unmanned train, and each unmanned train respectively comprises a train carrying platform and a broadcasting system connected with the train carrying platform; the real-time train broadcasting system also comprises a dispatching desk which is in broadband wireless connection with each unmanned train; as shown in fig. 2, the real-time broadcasting method for a train includes:
step S1, the dispatching desk adds each pilotless train needing real-time broadcasting into a train broadcasting talk group, and respectively sends a real-time broadcasting request to the train stations of each pilotless train in the train broadcasting talk group;
step S2, the vehicle-mounted station switches the corresponding broadcast system to a real-time broadcast state according to the real-time broadcast request, and sends a corresponding real-time broadcast response to the dispatching station according to the real-time broadcast state;
step S3, the dispatching desk sends real-time voice to each train station of each unmanned train in the train broadcast call group according to the real-time broadcast response;
and step S4, the vehicle-mounted station decodes the real-time voice to obtain decoded voice, and sends the decoded voice to the broadcasting system for real-time playing.
In a preferred embodiment of the present invention, as shown in fig. 3, step S2 includes:
step S21, the train-mounted station sets the corresponding train broadcast talk group as a default talk group according to the real-time broadcast request, then opens the broadcast voice channel of the corresponding broadcast system, and switches the voice output channel of the broadcast system from the loudspeaker to the broadcast voice channel so as to switch the broadcast system to a real-time broadcast state;
step S22, when the broadcasting system is successfully switched to the real-time broadcasting state, the vehicle-mounted station sends a real-time broadcasting response that the representation preparation is successful to the dispatching station, and when the broadcasting system is not successfully switched to the real-time broadcasting state, the vehicle-mounted station sends a real-time broadcasting response that the representation preparation is failed to the dispatching station;
when the broadcasting system is successfully switched to the real-time broadcasting state, in step S4, the vehicle-mounted station sends the decoded voice to the broadcasting voice channel for the broadcasting system to play.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a train real-time broadcasting system under unmanned scene which characterized in that includes:
the system comprises at least one unmanned train, a control system and a broadcasting system, wherein each unmanned train comprises a train carrying platform and the broadcasting system is connected with the train carrying platform;
a dispatch station establishing a broadband wireless connection with each of the unmanned trains, the dispatch station comprising:
the communication establishing module is used for adding each unmanned train needing real-time broadcasting into a train broadcasting communication group and respectively sending a real-time broadcasting request to the vehicle-mounted station of each unmanned train in the train broadcasting communication group;
the vehicle-mounted station comprises a broadcast preparation module, a real-time broadcast response module and a real-time broadcast response module, wherein the broadcast preparation module is used for switching the corresponding broadcast system to a real-time broadcast state according to the real-time broadcast request and sending a corresponding real-time broadcast response to the dispatching station according to the real-time broadcast state;
the dispatching desk also comprises a real-time broadcasting module which is used for sending real-time voice to each vehicle-mounted station of each unmanned train in the train broadcasting talk group according to the real-time broadcasting response;
the vehicle-mounted station also comprises a voice processing module which is used for decoding the real-time voice to obtain decoded voice and sending the decoded voice to the broadcasting system for real-time playing.
2. The train real-time broadcasting system of claim 1, wherein the broadcast preparation module comprises:
the first switching unit is used for setting the corresponding train broadcast talk group as a default talk group according to the real-time broadcast request, then opening a broadcast voice channel of the corresponding broadcast system, and switching a voice output channel of the broadcast system from a loudspeaker to the broadcast voice channel so as to switch the broadcast system to a real-time broadcast state;
the first response unit is connected with the first switching unit and used for sending the real-time broadcast response representing successful preparation to the dispatching desk when the broadcasting system is successfully switched to the real-time broadcasting state, and sending the real-time broadcast response representing failed preparation to the dispatching desk when the broadcasting system is not successfully switched to the real-time broadcasting state;
and when the broadcasting system is successfully switched to the real-time broadcasting state, the vehicle-mounted station sends the decoded voice to the broadcasting voice channel so as to be played by the broadcasting system.
3. The train real-time broadcasting system of claim 2, wherein the dispatching desk further comprises a call ending module, and the call ending module comprises a finish sending unit, which is configured to stop sending the real-time voice, send a broadcast ending request to each vehicle station in the train broadcast talkgroup, and delete the train broadcast talkgroup when the real-time broadcasting needs to be ended;
the vehicle-mounted station further includes a broadcast ending module, where the broadcast ending module includes a second switching unit, which is used to recover a default talk group before real-time broadcast according to the broadcast ending request, control to close the broadcast voice channel of the corresponding broadcast system, and switch the voice output channel of the broadcast system from the broadcast voice channel to a speaker, so as to switch the broadcast system to a state before real-time broadcast.
4. The train real-time broadcasting system of claim 3, wherein the vehicle-mounted station has an analog audio interface, the analog audio interface is connected to the broadcasting voice channel of the broadcasting system through a dry contact, and the vehicle-mounted station controls to open or close the dry contact so as to correspondingly open or close the broadcasting voice channel of the broadcasting system.
5. The real-time train broadcasting system of claim 3, wherein the broadcasting end module further comprises a second response unit connected to the second switching unit, for sending an end real-time broadcasting response to the dispatching desk after the broadcasting system is switched to the state before real-time broadcasting.
6. The train real-time broadcasting system of claim 5, wherein the communication ending module further comprises a timing unit, connected to the ending initiating unit, for starting timing and continuously outputting a timing result each time the broadcasting ending request is initiated, and outputting a repeat transmission signal when the timing result reaches a preset threshold time and the corresponding ending real-time broadcasting response is not received;
the end initiating unit initiates the broadcast end request again according to the repeated sending signal.
7. The train real-time broadcasting system of claim 1, wherein the dispatcher station transmits the real-time voice by way of a group call to the train broadcast talkgroup.
8. The train real-time broadcasting system of claim 1, wherein the dispatcher station establishes a broadband wireless connection with each of the unmanned trains through a 5G network or an LTE wireless broadband trunked network.
9. A real-time broadcasting method for a train in an unmanned scene, which is applied to the real-time broadcasting system for a train according to any one of claims 1 to 8, wherein the real-time broadcasting system for a train comprises at least one unmanned train, and each unmanned train comprises a train platform and a broadcasting system connected with the train platform; the train real-time broadcasting system also comprises a dispatching desk which establishes broadband wireless connection with each unmanned train; the real-time broadcasting method for the train comprises the following steps:
step S1, the dispatching desk adds each unmanned train needing real-time broadcasting into a train broadcasting talk group, and respectively sends a real-time broadcasting request to the train stations of each unmanned train in the train broadcasting talk group;
step S2, the vehicle-mounted station switches the corresponding broadcasting system to a real-time broadcasting state according to the real-time broadcasting request, and sends a corresponding real-time broadcasting response to the dispatching station according to the real-time broadcasting state;
step S3, the dispatch station sends real-time voice to each train-mounted station of each unmanned train in the train broadcast talkgroup according to the real-time broadcast response;
and step S4, the vehicle-mounted station decodes the real-time voice to obtain decoded voice, and sends the decoded voice to the broadcasting system for real-time playing.
10. The real-time broadcasting method for trains according to claim 9, wherein said step S2 includes:
step S21, the train-mounted station sets the corresponding train broadcast talk group as a default talk group according to the real-time broadcast request, then opens the broadcast voice channel of the corresponding broadcast system, and switches the voice output channel of the broadcast system from a loudspeaker to the broadcast voice channel so as to switch the broadcast system to a real-time broadcast state;
step S22, the vehicle-mounted station sends the real-time broadcast response representing successful preparation to the dispatching station when the broadcasting system is successfully switched to the real-time broadcast state, and sends the real-time broadcast response representing failed preparation to the dispatching station when the broadcasting system is not successfully switched to the real-time broadcast state;
when the broadcasting system is successfully switched to the real-time broadcasting state, in step S4, the vehicle-mounted station sends the decoded voice to the broadcasting voice channel for the broadcasting system to play.
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